Biology (Chapter 18)

2. the DNA-containing area of a prokaryotic cell (such as a bacterium)
3. asexual reproduction by a separation of the body into two new bodies.
4. one of two cycles of viral reproduction
7. a type of protein that can trigger normal proteins in the brain to fold abnormally.
8. a hair or a structure (as on the surface of a bacterial cell) resembling a hair.
10. involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell.
12. A differentiated cell formed within cells of certain Gram-positive bacteria that are extremely resistant to heat and other harmful conditions and agents.
13. a submicroscopic infectious agent that replicates only inside the living cells of an organism.

1. A type of virus that has RNA instead of DNA as its genetic material
5. sexual process in which two lower organisms of the same species, such as bacteria
6. A membranous sac or integument, especially surrounding partly or wholly a bodily structure or organ
9. single-celled organisms with a unique internal structure
11. the protein shell of a virus particle surrounding its nucleic acid.